Diagnosis Procedure
The fuel level sensor unit and fuel pump (main) and the fuel level sensor unit (sub) detect the fuel level in the fuel tank and transmit the fuel gauge signal to the combination meter.
- CHECK FUEL LEVEL SENSOR CIRCUIT
- Turn ignition switch OFF.
- Disconnect combination meter connector and fuel level sensor unit (sub) connector.
- Check continuity between combination meter harness connector and fuel level sensor unit (sub) harness connector.
Combination meter
Fuel level sensor unit (sub)
Continuity
Connector
Terminal
Connector
Terminal
M54
34
B38
2
Existed
- Check continuity between combination meter harness connector and ground.
Combination meter
Ground
Continuity
Connector
Terminal
M54
34
Ground
Not existed
Is the inspection result normal?
YES
GO TO 2.
NO
Repair harness or connector.
- CHECK FUEL LEVEL SENSOR UNIT (MAIN-SUB) CIRCUIT
- Disconnect fuel level sensor unit and fuel pump (main) connector.
- Check for continuity between the fuel level sensor unit (sub) harness connector and the fuel level sensor unit and fuel pump (main) harness connector.
Fuel level sensor unit (sub)
Fuel level sensor unit and fuel pump (main)
Continuity
Connector
Terminal
Connector
Terminal
B38
3
B37
2
Existed
- Check for continuity between the fuel level sensor unit (sub) harness connector and the ground.
Combination meter
Ground
Continuity
Connector
Terminal
B38
3
Ground
Not existed
Is the inspection result normal?
YES
GO TO 3.
NO
Repair harness or connector.
- CHECK FUEL LEVEL SENSOR GROUND CIRCUIT
Check continuity between fuel level sensor unit and fuel pump (main) harness connector and combination meter harness connector.
Fuel level sensor unit and fuel pump (main)
Combination meter
Continuity
Connector
Terminal
Connector
Terminal
B37
3
M53
24
Existed
Is the inspection result normal?
YES
Replace combination meter. Refer to COMBINATION METER : Removal & Installation .
NO
Repair harness or connector.